Github user uncleGen commented on a diff in the pull request:
https://github.com/apache/spark/pull/16818#discussion_r101187326
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala ---
@@ -180,16 +180,20 @@ class WindowSpec private[sql](
private def between(typ: FrameType, start: Long, end: Long): WindowSpec
= {
val boundaryStart = start match {
case 0 => CurrentRow
- case Long.MinValue => UnboundedPreceding
- case x if x < 0 => ValuePreceding(-start.toInt)
- case x if x > 0 => ValueFollowing(start.toInt)
+ case x if x < Int.MinValue => UnboundedPreceding
--- End diff --
In fact, the type of `start` and `end` should not be `Long` here, but we
can not change it for compatibility.
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